## Syntax highlighting for VHDL.

syntax vhdl "\.vhd$"
header "library IEEE;"
magic "VHDL"
comment "--"

# formatter
# linter

# Types.
color cyan "\<(bit|bit_vector|character|boolean|integer|real|time|string)\>"
color cyan "\<(severity_level|positive|natural|signed|unsigned|line|text)\>"
color cyan "\<(std_logic|std_logic_vector|std_ulogic|std_ulogic_vector)\>"
color cyan "\<(qsim_state|qsim_state_vector|qsim_12state|qsim_12state_vector|qsim_strength)\>"
color cyan "\<(mux_bit|mux_vectory|reg_bit|reg_vector|wor_bit|wor_vector)\>"

# Keywords.
color orange "\<(access|after|alias|all|architecture|array|assert|attribute|begin|block|body)\>"
color orange "\<(buffer|bus|case|component|configuration|constant|disconnect|downto)\>"
color orange "\<(else|elsif|end|entity|exit|file|for|function|generate|generic|group)\>"
color orange "\<(guarded|if|impure|in|inertial|inout|is|label|library|linkage|literal)\>"
color orange "\<(loop|map|new|next|null|of|on|open|others|out|package|port|postponed)\>"
color orange "\<(procedure|process|pure|range|record|register|reject|report|return)\>"
color orange "\<(select|severity|signal|shared|subtype|then|to|transport|type|unaffected)\>"
color orange "\<(units|until|use|variable|wait|when|while|with|note|warning|error|failure)\>"
color orange "\<(and|nand|or|nor|xor|xnor|rol|ror|sla|sll|sra|srl|mod|rem|abs|not)\>"

# Booleans.
color red "\<(true|false)\>"

# Strings
color green ""([^"\]|\\.)*""

# Comments.
color yellow "--.*"